Underground Works

Code:

EC0079

Acronym:

OSUB

Keywords
Classification	Keyword
OFICIAL	Geotechnics

Instance: 2008/2009 - 1S

Active?	Yes
Responsible unit:	Geotechnics Division
Course/CS Responsible:	Master in Civil Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
MIEC	27	Syllabus since 2006/2007	5	-	5	52,5	133

Teaching language

Portuguese

Objectives

Knowledge about underground works, namely in the aspects related to the use of underground space, with the phenomena of theses works and the use of numerical and analytical solutions for the calculations. Geomechanical characterization of the ground for the design of underground structures. Use of empirical methodologies and use of different constructive processes. Interaction with existing infrastructures at surface and importance of the monitoring of these works.

Program

Perspectives about the use of underground space. Classification of underground works. Transportation works (road and railway tunnels, subways, stations). Underground storage works (natural gas, liquid hydrocarbon, waste products). Underground urban environment. Underground mining exploration.
Underground work phenomena. Deformations due to the opening of a tunnel. Characteristic curves. Application of the convergence-confinement methodology. Surface tunnels.
Analytical solutions for lined and non-lined tunnels. Numerical methodologies. Use of the software Phase2 for tunnel calculations.
Geomechanical characterization. Preliminary studies. Conduction of the geological-geotechnical study.
Preliminary design of underground structures using empirical methodologies. AFTES recommendations.
Design of underground structures. Design sequence. Planning of the excavations. Use of blasting. NATM/SEM method. Road header and full face tunnel excavation machines. Open and closed type TBM’s, EPB solutions, slurry type shield. Different types of supports (bolts, shotcrete, metallic profiles, ground reinforcement, jet-grouting).
Interaction between underground structures and existing infrastructures at surface. Tunneling induced surface displacements and damage to the existing infrastructures.
Monitoring of underground works. Monitoring plan. Equipments. Alarm criteria.

Evaluation Type

Distributed evaluation with final exam

Eligibility for exams

In accordance with the General Assessment Rules.

Special assessment (TE, DA, ...)

In accordance with the General Assessment Rules.

SPECIAL RULES FOR MOBILITY STUDENTS:
Proficiency in Portuguese and/or English;
Previous attendance of introductory graduate courses in the scientific field addressed in this module;
Evaluation by exam and/or coursework(s) defined in accordance with student profile.

Classification improvement

In accordance with the General Assessment Rules.

Observations

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Estimated working time out of classes: 4 hours